What polygon? Your asking "what are two names to describe a polygon" but haven't given a polygon...
A concave polygon.
Parallelogram, quadrilateral Parallelogram means "All opposite sides are equal" Quadrilateral means "Four-sided"
concave
Two words that could describe a triangle are "three-sided" and "polygon." A triangle is a geometric figure characterized by having three edges and three vertices, classifying it as a specific type of polygon.
The name of a twenty-two edged polygon is an icosikaidigon. Please see the link for a list of names for neighboring polygons.
an parallelogram :) plane figure, any polygon
polygon & quadrilateral * * * * * That is not really true. A trapezoid is a particular type of quadrilateral and that, in turn, is a particular type of polygon. That does not make them alternative names for a trapezoid.
they came from how many sides are on the polygon
you can describe it by its angles, or sides
The name of a fifteen sided polygon is known to have two names : pentakaidecagon, pentadecagon John Irving Dr. Math
-- quadrilateral -- parallelogram
A.Eguilaeral,acute